Traction-wheel



(No Model.)

H. M. SHEER 82; P. DILLEMUTH.

TRACTION WHEEL. No. 348,786. Patented Sept. 7, 1886.

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UNIT D STATES PATENT OF IC HENRY M. SHEER AND FREDRIGK DILLEMUTI-I, OF QUINCY, ILLINOIS.

TRACTlON-WHEEL.

SPECIFICATION forming part of Letters Patent No.348,786, dated September '7, 1886.

(No molel.)

To all whom, it may concern.-

Be it known that we, HENRY M. SHEER and FREDRICK DILLEMUTH, both of Quincy, in the county of Adams and State ofIllinois, have invented certain new and useful Improvements in Traction-\Vheels; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the figures and letters of reference marked thereon.

Ourinvention relates to that class ofdrivingwheels used on traction-engines and otherselfpropelling vehicles; and it consists in mechanism whereby a series of spades or projections are caused to project from the bottom of said wheel and prevent it from slipping or spinning. It also consists in mechanism whereby said spades are withdrawn when they arrive at the top of the wheel, no matter how far they have been projected when at the bottom; and it further consists in certain details of construction and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a sectional view taken through a wheel having our invention applied thereto. Fig. 2 is a perspectiveview of the operating mechanism, showing two of the spades in dotted lines, part of the retracting-cam beingbroken away. Fi 3 is a View of one of the spades. Fig. 4 is a view of a detail.

Similar letters of reference in the several figures indicate the same parts.

A represents the axle of the vehicle, B the wheel, 0 the projecting-cam, and D the retracting-cam. This retracting-caml) is held stationary when in operation, and the projecting-cam rendered adjustable through mechanism to be hereinafter described.

The base-plate 1*] is fastened to the frame or other solid part of the vehicle, and has an opening at approximately its center, through which the axle passes. On the face of this plate is formed a projection, F, through which the aXle is also adapted to pass. The projection may be made solid, or, when lightness is desired, as shown in the drawings, with the axle pass ing through its end.

Arms G G are hinged to the base-plate, preferably by casting lugs thereon and securing one end of each arm between them, as shown clearly in Fig. 2, and in order that these arms may move simultaneously up and down we connect them together near their outer ends by means of pieces of metal H H, located one on each side of said arms and bolted or otherwise pivotally connected thereto. Formed integral with or attached to the outer end of the lower arm G is the mojecting-cam 0, made, preferably, in the form of a crescent, so as to encircle or partially encircle the axle when retracted.

As shown in Fig. 1, a slot is formed in the upper arm, and through it passes the adjusting-screw I, that screws into the projection F on the base-plate E. This screw is prevented from being drawn through the slot in the arm by any suitable n1eanssuch, for instance, as a collar, a. (Shown in Figs. 1 and 2.) As is now perfectly obvious, when it is desired to adjust the projecting-cam down, for instance, and, as a consequence, the spades out, the screw I is screwed down, carrying with it the upper arm, and the latter, through the medium of the connecting-pieces H H and lower arm, moving the cam downwardly in proportion.

As is perfectly obvious, the adj usting-screw I may be made to operate the arms both ways; but we preferably employ a spring, K, under the lower arm for returning them to their normal position, or position in which the retraeting-cam will not operate.

The spades L, the outer ends of which enter the ground and prevent the slip of the wheel, preferably pass through the spokes, and the projection on their inner ends, passing on the inside of the retractingcam an d on the outside of the projecting-cam, causes thorn, when the said projecting-cam is down, to be forced out as they reach the bottom of the wheel and to be retracted as they go toward the top.

The preferred form of spade is shown in Fig. 3, and is made with its outer end of shape, with a projection in the angle which performs a double functionviz., that of strengthening the end where it joins the shank and of preventing the removal of the spades after the plate M has been applied to the rim. On the inner end of the shank are arranged frictionrollers N N, for preventing friction on the two cams O and D. When these rollers are employed, it is not essential that the plates M U by Letters Patent, is

should be used, as the enlargement on the inner end of the shank will prevent the removal of the spades.

It will be seen from the above description that any inward thrust on the projected spades such as is caused by striking a stone ora hard road-will be transmitted to the axle through the projecting-cam, arms G G, and connecting pieces H H, adj usting-screw, and projection 011 the base-plate, through which the axle passes.

When the spades are retracted, they fill the sockets in the end of the spokes and rim, and consequently any thrust on thenrin this position will be transmitted directly through the wheel to the axle.

It will be observed that our invention is very simple, strong, durable, and easily adjusted, the adjusting-screw being readily accessible, either from the vehicle itself or from the out side of the wheel; or, if desired, it may be connected through suitable meanssuch as a rod or chain-to an operating mechanism within easy reach of the engineer.

\Vhat we claim as new, anglesire to secur 1. In a traction-wheel for self-propelling vehicles, the combination of a series of movable spades for preventing the slip of the wheel, a movable cam for projecting said spades, and a stationary cam for causing their retraction, substantially as described.

2. In a traction-wheel for self-propelling vehicles, the combination, with aseries of movable spades for preventing the slip of the wheel, of a cam for projecting said spades moved positively outward and retracted by means of a spring, substantially as described.

3. In a traction-wheel for self-propelling vehicles, the combination, with a series of movable spades for preventing the slip of the wheel, of a stationary cam for retracting said spades and a movable cam for projecting them, said movable cam being connected through mechanism whereby the thrust of the spades is supported by the axle, substantially as described.

4. In a mechanism for operating the movable spades of a traction-wheel, the combination of abase-plate and two arms hinged to said base-plate and linked together at their outer ends, the lower one of said arms carrying a movable cam and the upper one carrying the screw for adjusting said cam, substantially as described.

5. In a traction-wheel for self-propelling ve hicles, a series of radial sockets in the periphery thereof, and a series of movable spades sliding in said sockets and having a bearing therein to prevent their retraction beyond a certain point, in combination with cams for causing their projection and retraction, whereby the thrust on the spades when retracted will be received by the wheel, but that when projected the thrust will be received by the projecting mechanism, substantially as described.

HENRY M. SHEER. FREDRIOK DILLEMUTH.

Vitnesses:

L. E. EMMoNs, LILLIE F. EMMONS. 

